He only likes her purely because she’s older

His father married someone young and so his mother is practically Hae-soo’s age just to get back at his father for some twisted reason or he has a weird obsession to be EXACTLY like his father by marrying someone with an age gap and upholding the family name. Both red head and the young one are toxic. :/ Even is the young one is cute he doesn't have a meaningful reason to like her other than probably just lusting for her only. Wish he’d be more romantic instead of lying and making up everything…